Important 30 questions of physics class 12th download PDF
Q. Define capacitance of a Conductor and derive an expression for the energy stored in a capacitor.
Q. What are dia, para and ferromagnetic materials '? Discuss their important properties.
Q. What is meant by root mean square vatue of ac. ? Derive an , expression for r.m.s. value of attemating current.
Q. State Huygen’s Principle. Prove laws of reflection on the basis of Huygen’s principle.
Q. derive an expression for the electric field at a point on the axial line of dipole.
Q. Give thé principle. construction and working of a moving coil galvanometer.
Q. Derive an expression for the magnetic force on a current carrying conductor in a uniform magnetic field . when is force maximum and minimum with examples.?
Q..Derive an expression for the electric field at a point on the axial line of n electric dipole.
Q. Give the principle, construction and working of Van de Graff's generaton
Q. State Biot Savart's law. Hence derive an expression for the magnetic field at the centre of a current carrying circular coiL.
Very very important
Q. What diamagnetic, paramagnetic and ferromagnetic substances ? Give their properties.
Q. Using Gauss’s law determine the electric field intensity due to a long
thin Wire of uniform linear charge density.
thin Wire of uniform linear charge density.
Q. What is electric potential ? Derive an expression for electric potential
at a distance from a charge ‘.
at a distance from a charge ‘.
Q. Derive an expression for the force per unit length acting on each of two straight parallel metallic conductors carrying current in the same direction and kept near each other and hence define one ampere. Important exam view
Q. What is magnetic dipole. Derive an expression for magnetic field strength at a point on the axial line of a bar magnet.
(v.v.v.important revised many time )
(v.v.v.important revised many time )
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